[Enhancement]ScreenShare audio subscription (#973)

Author: ipavlidakis

Sources/StreamVideo/WebRTC/v2/Extensions/CallParticipant+Convenience.swift

@@ -56,6 +56,16 @@ extension CallParticipant {
                     type: .screenShare
                 )
             )
+
+            /// We subscribe to screenShareAudio anytime a user is screenSharing. In the future
+            /// that should be driven by events to know if the user is actually publishing audio.
+            result.append(
+                .init(
+                    for: userId,
+                    sessionId: sessionId,
+                    type: .screenShareAudio
+                )
+            )
         }
 
         return result

StreamVideoTests/WebRTC/v2/Extensions/CallParticipant_TrackSubscriptionTests.swift

@@ -63,8 +63,9 @@ final class CallParticipant_TrackSubscriptionTests: XCTestCase, @unchecked Senda
         let result = participant.trackSubscriptionDetails(incomingVideoQualitySettings: incomingSettings)
 
         // Then
-        XCTAssertEqual(result.count, 1)
+        XCTAssertEqual(result.count, 2)
         XCTAssertEqual(result.first?.trackType, .screenShare)
+        XCTAssertEqual(result.last?.trackType, .screenShareAudio)
     }
 
     func test_trackSubscriptionDetails_givenParticipantHasVideoAndVideoIsDisabled_whenVideoDisabled_thenDoesNotAddVideoTrackDetails(

StreamVideoTests/WebRTC/v2/WebRTCJoinRequestFactory_Tests.swift

@@ -427,7 +427,7 @@ final class WebRTCJoinRequestFactory_Tests: XCTestCase, @unchecked Sendable {
             incomingVideoQualitySettings: .none
         ).sorted { $0.sessionID <= $1.sessionID }
 
-        XCTAssertEqual(result.count, 3)
+        XCTAssertEqual(result.count, 4)
         XCTAssertEqual(result[0].userID, "1")
         XCTAssertEqual(result[0].sessionID, "1")
         XCTAssertEqual(result[0].trackType, .video)
@@ -438,7 +438,10 @@ final class WebRTCJoinRequestFactory_Tests: XCTestCase, @unchecked Sendable {
         XCTAssertEqual(result[1].trackType, .audio)
         XCTAssertEqual(result[2].userID, "3")
         XCTAssertEqual(result[2].sessionID, "3")
-        XCTAssertEqual(result[2].trackType, .screenShare)
+        XCTAssertEqual(result[2].trackType, .screenShareAudio)
+        XCTAssertEqual(result[3].userID, "3")
+        XCTAssertEqual(result[3].sessionID, "3")
+        XCTAssertEqual(result[3].trackType, .screenShare)
     }
 
     // MARK: - buildPreferredPublishOptions